"""Cubre el endpoint /demo: sirve el index estático."""
from fastapi.testclient import TestClient


def test_demo_serves_index_html(client: TestClient) -> None:
    response = client.get("/demo/")
    assert response.status_code == 200
    assert "text/html" in response.headers.get("content-type", "")
    assert "__APP_NAME__" in response.text or "demo" in response.text.lower()


def test_metrics_endpoint_responds(client: TestClient) -> None:
    response = client.get("/metrics")
    assert response.status_code == 200
    assert "text/plain" in response.headers.get("content-type", "")


def test_openapi_accessible_when_auth_disabled(client: TestClient) -> None:
    response = client.get("/openapi.json")
    assert response.status_code == 200
    spec = response.json()
    assert spec["info"]["title"] == "__APP_NAME__"